Not exactly the same, but when I took my camper for it's MOT the chassis number didn't bring up the correct vehicle info, next I hear the boss man saying that they had to report it to the CID as it may be a ringer etc etc, I'm frantically ringing around and Vaughn offers to store it in Leicester until we can sort it out. Then this other mechanic comes out a bit later, says "Your MOT's over there" I told him what his boss said and he just laughed and walked off, the b'stards were having me on.

Thing is, it was feasible that it could have been a ringer as the guy who restored it restored it from a bare shell and got parts from it here and there as it's not original. Everything was ok by the way.